How efficient is a 20 year old boiler?

How efficient is a 20 year old boiler?

How efficient is a 20 year old boiler?
Modern condensing boilers are between 89-94% efficientBoilers that are more than 20 years old can be as little as 60% efficient. What does that mean? A boiler’s ‘energy efficiency‘ is the percentage of the total energy used by the boiler to provide useful heating.

Should I replace my 20 year old boiler?

Should I replace my 20 year old boiler?
The industry standard advice is to replace your boiler every 10 years, however some people still have boilers working that are over 30 years old. … The very old boilers that keep going almost indefinitely do so because there is very little to go wrong in them. This might sound ideal, but they are terrible on gas bills.